Side-car chassis for motor-cycles.



. A. SCOTT.

SIDE CAR CHASSIS FOR MOTOR CYCLES.

APPLICATION FILED NOV.'5, 1912.

Patented Jan. 19, 1915.

THE NORRIS PETERS CO4, PHO70-LITHO.. WASHINGTON. D C,

. E5 TED STATES PATENT OFFICE.

,ALFBED ANGAS SCOTT OF BRADFORD, ENGLAND.

SIDE-CAB. CHASSIS FOR .1VIOTOR CYCLES.

To all whom it may concern Be it known that I, ALFRED An ons S'oorr, ,asubject of the King of Great Britain, residing at Mornington Works,Grosvenor road, Bradford, Yorkshire, England, have invented certainnewand useful :Improvements in Side Car Chassisfor Motor-Cycles; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as willenable others skilled in theart to which it appertains to make and use thesame.

This invention relates to animproved side car chassis for motor cycles.

The object of the invention isto provide a side car, the chassis ofwhich willbe as light aspossible, having regard to the necessarystrength and to'provide aside car'in which the use of bent tubes andintermediate joints is avoidedso that as far as practicable, all themembers composing the chassis shall be submitted to tension andcompression strains only, and not to bending strains.

The invention is illustrated in the accompanying drawings, in whichFigure 1 is a perspective view of the chassis, with carremoved, andshowing the manner of attachment to a motor cycle; Fig. 2 is asideelevation showing the-chassis ofa side car in accordance with thepresent invention, with the outer wheel removed and a portion of thebody removed; Fig. 3 is an end view of Fig. 2 showing the wheel of theside car in position; and Fig. 1 is a plan view of a side car showingits connection to the frame of amotor cycle, only such parts of themotor cycle asare necessary to show the attachment of the side car to itbeing shown.

The present side car is constructed so as to form atriangulatedstructure and so that the points at which the chassis isconnected to the motor cycle are angles of the triangles which go toform the triangulated structure as a whole.

From this it will be obvious that the members of the chassis will not besubmitted to bending strains, but only to compression and tensionstrains.

In carryin out the invention, as shown in the drawings, a member 1,preferably tubular, projects out at right angles from the motor cycle 2and is"connected to the back wheel bracket 30f the motor cycle.

Two diagonally-disposed reach "members 4 l are connected to the ends, ofthe tubular member 1 and joined at '5 substantially Specification ofLetters Patent.

.the carriage body 16.

.beneath said tubular member. A member 7 :joinsmthe two .reach members Hat 5 with a junction piece 9; thus forming iLIliiLPGX at 5 to whlch issecured a connecting rod 6 arranged so that its upper end can'be securedto .the saddle pillar 6 of the motor-cycle, or in proximity thereto. Theforward end of this connecting member -7 is connected by means of ajunction :11 adapted to be secured at any convenient point on the lowerframe of the motor cycle.

Patented Jan..19, 19 15. j

\ Applicationfi-ledNovember 5,1912. Ser-ia1fNo/729,580.

The wheel 1 is mounted on the axle memher 1. The axle member 1, whichprojects out from the back wheel bracket 3, is provided .with two lugs12, one toward each end, which carry between them a solid rod 13, uponwhich is mounted a sleeve 13 Thiszsleeve 13 carries arms 14, whichnormally project forward somewhat and carry a cross piece 15, which inturn carries two spiral springs 16 which act as supports for The sleeve13 has another arm 17, which is preferably bent so as'to pass beneaththe axle member 1 and to project under the carriage body 16.

This arm 17 is connected at its outer end to helical springs 18, whichare fixed at their forward ends to a bracket or lug 19 on the forwardmember 7 of the chassis. The carriage body 16 is mounted on the chassisas regards its front end by a suitable C spring 20, which is mounted onthe junction piece 9. If desired, a second brace rod 21 may be arrangedconnecting the coupling 9 to the inner end of the tubular member 1, asshown.

From the foregoing description, it will be seen that the greater part ofthe weight of the body and passenger is carried through thesleeves 12-3to the solid rod 18, to the lugs "12 and so to the ends of the axlemember 1 projecting out from the back wheel of the motor cycle, so thatthis member 1 is not submitted to any appreciable bending strains. Thegreater part of the driving strains is taken up through the attachment6, being transmitted through the apex 5 of I the reach member, to theconnecting member 7 and through the braces 8 and 21 to the ends of theaxle member 1. Such strains as are taken up by the attachment members 10and 11 are transmitted to the coupling piece 9, and so to the ends ofthe axle member. 1.

In addition to the afore-mentioned reinforcing elements, the axle member1 may have secured to it a horizontally disposed truss member 22, and astrut member 24. bracing the same at the point 23 from the apex 5 of thereach members 4 l and the connecting member 7 In this case, the point 23may also act as the point of con nection for a brace rod 6 adapted toconnect to the frame of the motor cycle at a point near the attachmentof its adjacent brace bar 6.

I declare that what I claim is 1. In a side car chassis for motorcycles, an axle member, a wheel supporting said axle member at one endthereof, a forwardly projecting brace member secured substantially atthe outer end of said axle member, a junction piece secured at theforward end of said brace member, downwardly inclined reach memberssecured substantially at each end of said axle member, a second junctionpiece connecting the downwardly projecting ends of said reach members, aconnecting member joining said first mentioned junction piece with saidsecond mentioned junction piece, and attachment members secured betweensaid chassis and the frame of the motor cycle, substantially asdescribed.

2. In a side car chassis for motor cycles, an axle member, a wheelsupporting said axle member at one end thereof, forwardly projectingbrace members secured substantially at each end of said axle member, ajunction piece connecting the forward ends of said brace members,downwardly inclined reach members secured substantially at each end ofsaid axle member, a second junction piece connecting the downwardlyprojecting ends of said reach members, a connecting member joining saidfirst mentioned junction piece with said second mentioned junctionpiece, and attachment members secured between said chassis and the frameof the motor cycle, substantially as described.

3. In a side car chassis for motor cycles, an axle member extending thewidth of said chassis, a wheel supporting said axle member at one endthereof, forwardly projecting brace members secured substantially at-.each end of said axle member, a junction piece connecting the forwardends of said brace members, downwardly inclined reach members securedsubstantially at each end of said axle member, a second junction piececonnecting the downwardly projecting ends of said reach members, aconnecting mem ber joining said first mentioned junction piece with saidsecond mentioned junction piece, a diagonally disposed attachment Gopiesof, this patent may be obtained for member secured between said firstmentioned junction piece and the steering head of the motor cycle, ahorizontally disposed attachment member secured between said firstmentioned junction piece and the lower frame of said motor cycle, andadiagonally disposed attachment member secured between said secondmentioned junction piece and the saddle pillar of the said motor cycle,substantially as described.

l. In a side car chassis for motorcycles, an axle member, a wheelsupporting said axle member at one end thereof, forwardly projectingbrace members secured substan tially at each end of said axle member, ajunction piece coimecting the forward ends of said brace members;downwardly inclined reach members secured substantially at each end ofsaid axle member, a second junction piece joining the downwardlyprojecting ends ofv said reach members, a connecting member joining saidfirst mentioned junction piece with said second mentioned junctionpiece, a horizontally inclined truss member reinforcing said reachmembers, a strut member secured between said truss member and saidsecond mentioned junction piece, and attachment members secured betweensaid first mentioned junction piece and said second mentioned junctionpiece and the frame of the motor cycle, substantially as described. I V

5. In a side car chassis for motor cycles, an axle member, a wheelsupporting said axle member at one end'thereof, forwardly projectingbrace members secured substantially at each end of said axle member, ajunction piece connecting the forward ends of said brace members;downwardly injclined reach members secured substantially at each end ofsaid axle member, a second junction piece joining the downwardlyprojecting ends of said reach members, a connecting member oining saidfirst mentioned junction piece with said second mentioned junctionpiece, a horizontally inclined truss member reinforcing said reachmembers, a strut member secured between said truss member and saidsecond mentioned junc' tion piece, attachment members secured betweensaid first mentioned junction piece and said second mentioned junctionpiece and the frame of the motor cycle. and'an attachment member securedbetween said truss member and the frame of said motor cycle,substantially as described.

In testimony whereof, I aflix my signa ture, in presencepofj twowitnesses.

ALFRED ANGAS SCOTT.

WVitnesses HUBERT PUMPHREY, CHARLES HILBERT.

five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

